Method of and apparatus for making strip shingles



Jame 24, 19%; F. c. OVERURY I METHOD OF AND APPARATUS FOR MAKING STRIP SHINGLES Filed Aug; 16, 1926 Patented June 24, 1930 UNITED TA FREDERICK C. OVERBU-RY, F HILLSIDALE, NEW JERSEY, ASSIGNOR, BY MESNE AS- SIGNMEN'IS, TO THEPATENT. AND LICENSING CORPORATION, OF BOSTON, MASSA- CHUSETTS, A CORPORATION OF MASSACHUSETTS shingle.

METHOD OF AND APPARATUS FOR MAKING STRIP SH'IN'GLES Application filed August 16, 1926. Serial No; 129,485.

This invention relates to a method of and apparatus for making fabricated roofing elements, more particularly the type of element commonly known as a strip shingle. Roofing .fibers or the like, which has been formed on paper-making machine. The fibrous foundation is saturated with a suitable waterproofing I material such as low melting point asphalt after which it is coated on one or both faces with a waterproofing layer of high melting-point or blown asphalt which by reason'of its relatively high melting point and tough and rubbery consistency is'particularly suited for this purpose. The waterproof coating layer is thereupon surfaced with a protective masklng layer of comminuted or granular material in order to protect the asphalt layer from the deteriorating action of the Weather, particularly the suns rays. The granular material which may consist of crushed slate, brick, tile, ground cork, sawdust, or other equivalent material, may be applied to both surfaces or to the weather side only of the strip coating on the under side, such coating is usually dusted with talc, powdered mica or equivalent 'material, to make the surface non-sticky. From a sheet thus prepared, strip shingles of suitable size and-shape are cut and such strip shingles have been sold as a finished product ready for; use. It has been found advanta eous, however, to protect the cut edges of such roofing elements whichare exposed to the weather, since such edges, if not protected, make it possible for atmospheric moisture to soak into or dry out of the fibrous base of the shingle'through the cutends of the fibers which appear at such edges. These changes of moisture contents, together with loss of volatile constituents of the saturant, tend to cause the shingle to sponge or bulk and the corners to warp and curl, causing rapid-deterioration of the roofing elements. The life of the shingle may be greatly prolonged therefore by sealing the cut edges which are to be exposed to' In the latter case, if there be a the weather with suitable coating material, this material being preferably surfaced with grit or the like to protect it from the light.

I am aware that broadly speaking it is not new to make strip shingles with eXposed\55. edges sealed, but I have devised a novel' :method for producing such an article, and

"apparatus for carrying out the steps in the method. This will be more clearly understood from the disclosure on the drawing, of

which Figure 1 represents apparatus designed to"- 11 which are designed to cut longitudinal series of transversely extending slots in a manner illustrated in Figure 2, or in any other desired way.

The sheet may then be led through a container 12 wherein it is thoroughly impregnated with a suitable waterproofing saturant 13, the excess saturant being removed from the sheet as by a pair of rolls 14. If desired, the slotting and saturating steps may be interchanged.

The slotted and saturated sheet is then partially dried and cooled as by a seriesof looping rollers 15 from which ,the sheet may be led into a container 16 having suitable coating material 17 therein such as blown asphalt. Since asphalt of this nature must be heated to a relatively high temperature in. order to give it-the proper fluidity, the sheet shouldnot be allowed to remain in the tank long or the fibers are liable to be scorched and injured. It is therefore passed about a single roll- 18 which carries it through a portion of the coating in the tank 16. In order to insure a complete and thorough coating for both faces of the sheet, I may place'a trough 19 adjacent the upper portion. of the roll 18 into which molten asphalt is supplied as by a suitable feedd line 20. The trough 19 is adapted to main.-

excess from the pool in' fthe trough 19 flows into the container. -16 and may servegas a supply for said container; The. surface .of the ,sheetaw'ay-from the roll 18 will pick up from the tank a complete mania-get asphalt on its face and'carry it upward as indicated in Figure 1. 'vThesheet is thereupon passed about a roller21 which is sufiiciently spaced roller 21, a .slitting roll 22 may be provided sheet therebetween.

from the roller 18 so as not to squeeze the As thesheet passes around the roller 21 and presses thereagainst, asphalt will be carried therebetween having been broughtup from the tank 17 on the surface of the sheet. WVorkin'g against the to cut slits in the sheet along the lines 23, these lines passing through the slots in the sheet.- The. ressure ofthe sheet against the face of t e roller 21 due to the tension of the sheet will cause some of the coating material which is being carried between the sheet and the roll 21\,to ooze through the slits 23 made by the roll 22 .and will thus cause the cut edges along the slits 23 to be thoroughly sealed with coating material.

The slits 23 passing through the slots in the sheet form shingle-simulating tabs for the strip s ingles, these tabs being somewhat soft a. limp 'at this stage of manufacture and lie ale to stick to the rolls 21 and to tear. In order to prevent trouble from this source, I provide a doctor 24 to engage the surface 3 bf-the roll 21 where the sheet leaves the roll and to separate the tabs therefrom without be arranged tow'ork against the roll 18, in

. which case a doctor should be supplied for thus making that roll to strip the 'slit sheet therefrom.

The rolls 18 and 21 and-the doctor 24 are preferably heated by any suitable means in order to p'reventthe asphalt from congealing thereon or sticking thereto. after having been separated from the roll is thereupon passed over 'a series of brushes 25' which run iii-a body of powdered talc or mica and-which -"serve to support the tabs and to dust th "under coating of the sheet, men-sticky. The sheet is thereupon carried along on a suitable table 26 to a grit hopper 27 from which grit is showered on the upper surface, a receptacle .28 being provided to'catch the grit which may fall over the edges or throughv the slots, The gritis suppliedpreferably in excess so that there is sufficient to stick not only to the coated upper face, but also to the coated surface of the'sheetleaving the roll 18 The asubstantial layer of molten' The sheet side edges and end edges of the tabs. After .passing over suitable cooling rolls 29, the

sheet is then further slit between the rows of slots as at 30 by a suitable slitter 31, after which a cutter 32 mav pe provided to cut lines 33.

' the strips into indivic al elements as on'the Having thusv described an embodiment of my invention it should be evident to those skilled in the art that many changes and modifications may be made therein-without departing from its spirit or scope as defined v by the appended claims.

I claim: 1. Stepin the method of making roofing elements, which comprise coating both faces of a sheet of roofing material with films of.

liquefied waterproofing compound, putting one of said films while still. liquid under-Y pressure greater than that on the. opposite face of'the sheet, and cutting a slit through said sheet in the region of such pressure;

2. Steps in the method of making'roofing elements, which comprise coating a face of a sheet of roofing base with a film of liquefied waterproofing compound, pressing said film against the face, and cutting a slit through the sheet from the opposite face while said film is so pressed. g

.3. A method of'niaking roofing elements, which comprises coating a sheet of roofing base with molten asphalt, slitting the coated .sheet longitudinally while the asphalt is .fiuid, and causing molten asphalt to coat the cut edges surfacing the coated faces and cut edges of the sheet with comminuted material,and.dividing the sheet into individual elements.

4. A method of making roofing elements, which comprises. slotting and saturating with waterproofing material a sheet of roofing base of'indeterminate length,'the

slots being in series longitudinal with respect to the sheet and spaced from the edges' thereof, applying molten coating material to both faces of the sheet, slitting the sheet While. the coating is still fluid, squeezing coating material through the cuts made by the slitter, surfacing the coated faces and .edges with comminuted material, and cutting individual elements from the sheet.

5. A method of making roofing elements, which comprises slotting and saturating with bitumen a sheet of roofing felt of indeterminate length, the slots being in longitudinal series, passing the saturated sheet through a coating'bath of molten blown asphalt, slitting the sheet longitudinally through the slots while the coating is fluid, squeezing coating material through the slits,

dusting one face of the sheet with non-sticky inateriah'surfacmg the other face and the out edges with grit, and severing individual elements from the sheet.

6. Y Apparatus for making roofing elements,

comprising means for slotting and saturat ing a sheet of roofing felt of indeterminate length, means for applying liquefied water- 7' proofing material to the faces of the sheet, means for slitting the coated sheet longitudinally and forcing coating material through the cut to coat the cut edges While the coating is fluid, means for surfacing all the coated surfaces with comminuted mam terial, and means for severing individual elements from the sheet. I

7. Apparatus for making roofing elements, comprising means for coating the faces of a sheet of roofing of indeterminate length with liquefied waterproofing material, slitting the sheet longitudinally and causing the Waterproofing material to flow over and seal the edges of the slit, said means comprising a guide roll adapted to be partially immersed in a pool of coating material, a second guide roll spaced therefrom, and a slitter roll positioned to Work against one of said guide rolls, means for applying pul'verulent material to a face ofthe coated sheet,- and means for depositing granular material onithe otherface and the edges of the sheet. 1 v v I In testimonmwhereof I have'aifixed my signature. 20 FREDERICK C. OVERBURY. 

